Abstract
In the industrial control system, there are a variety of PLC, which are made of different manufacturers and with various types, working in the operation line for different enterprises. Due to the different communication protocols and information exchange standards, it is difficult to achieve information sharing and unified management, and easily leading to "information island". In this paper, the PLC information model is put forward to design the information standard, and further to realize the standardization of data collection and industrial information, system integration and information sharing, and then set up the industrial control information standard. The modeling and drawing principle of PLC information model based on UML is introduced, and the modeling and drawing method of PLC information model based on EA UML modeling tool is presented.
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